Immunochemical detection of in vivo advanced glycosylation endproducts
The circulating advanced glycosylation endproducts Hb-AGE, serum AGE-peptides and urinary AGE-peptides are disclosed as long term markers of diseases and dysfunctions having as a characteristic the presence of a measurable difference in AGE concentration. Diagnostic and therapeutic protocols taking advantage of the characteristics of these AGEs are disclosed. Antibodies which recognize and bind to in vivo-derived advanced glycosylation endproducts are also disclosed. Methods of using these antibodies as well as pharmaceutical compositions are also disclosed, along with numerous diagnostic applications, including methods for the measurement of the presence and amount of advanced glycosylation endproducts in both plants and animals, including humans, as well as in cultivated and systhesized protein material for therapeutic use.
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Claims
1. An antibody reactive with in vivo-formed advanced glycosylation endproducts and having the following characteristics:
- A. it reacts with an immunological epitope common to said in vivo-formed advanced glycosylation endproducts;
- B. it is cross reactive with advanced glycosylation endproducts formed in vitro; and
- C. it is not cross reactive with the following model advanced glycosylation endproducts however formed: 2-(2-furoyl)-4(5)-(2-furanyl)-1H-imidazole (FFI), 1alkyl-2-formyl-3,4-diglycosyl pyrrole (AFGP), 5-hydroxymethyl-1-alkylpyrrole-2-carbaldehyde (pyrraline), and pentosidine.
2. The antibody of claim 1 wherein the advanced glycosylation endproducts formed in vitro and reactive with said antibody are selected from the group consisting of AGE-RNAse, AGE-hemoglobin, AGE-albumin, AGE-LDL, AGE-collagen Type IV, AGE-BSA reduced with NaBH.sub.4, and mixtures.
3. The antibody of claim 1 prepared by hyperimmunizing a mammal with a foreign protein or the reaction product of a protein incubated with a reducing sugar.
4. The antibody of claim 3 wherein said reaction produce of a protein incubated with a reducing sugar is AGE-RNAse.
5. The antibody of claim 1 wherein said antibody reacts with diabetic tissue and serum that contain elevated levels of advanced glycosylation endproducts.
6. The antibody of claim 5 which reacts with rat aortic collagen from subjects with experimentally-induced diabetes, and with human serum from diabetic subjects.
7. The antibody of claim 1 which is from high titre antiserum.
8. The antibody of claim 7 wherein titre of said antiserum is determined from a serum dilution giving 50% maximum OD.sub.405 signal using an alkaline phosphatase-conjugated second antibody and p-nitrophenylphosphate as the colorimetric substrate.
9. The antibody of claim 7 wherein said high titre antiserum comprises at least 10.sup.-5 as determined in a noncompetitive ELISA.
10. The antibody of claim 1 wherein said epitope is formed by the incubation of a reducing sugar with a proteinaceous material selected from the group consisting of RNAse, hemoglobin, lysine, collagen Type IV, LDL, BSA and HSA.
11. The antibody of claim 10 wherein the reducing sugar is selected from the group consisting of glucose, glucose-6-phosphate, fructose, and ribose.
12. The antibody of claim 1 wherein said epitope is formed by the incubation of glucose with RNAse.
13. The antibody of claim 1 which is polyclonal.
14. The antibody of claim 1 which is monoclonal.
15. A labeled antibody reactive with in vivo-formed advanced glycosylation endproducts and having the following characteristics:
- A. it reacts with an immunological epitope common to said in vivo-formed advanced glycosylation endproducts;
- B. it is cross reactive with advanced glycosylation endproducts formed in vitro; and
- C. it is not cross reactive with the following model advanced glycosylation endproducts however formed: 2-(2-furoyl)-4(5)-(2-furanyl)-1H-imidazole (FFI), 1-alkyl-2-formyl-3,4-diglycosyl pyrrole (AFGP), 5-hydroxymethyl-1-alkylpyrrole-2-carbaldehyde (pyrraline), and pentosidine.
16. The labeled antibody of claim 15 wherein said label is selected from the group consisting of an enzyme, a chemical which fluoresces, and a radioactive element.
17. The labeled antibody of claim 15 which is polyclonal.
18. The labeled antibody of claim 15 which is monoclonal.
19. A composition containing an anti-AGE antibody in combination with a pharmaceutically acceptable carrier;
- wherein said anti-AGE antibody is reactive with in vivo-produced advanced glycosylation endproducts and has the following characteristics:
- i. it reacts with an immunological epitope common to said in vivo-formed advanced glycosylation endproducts;
- ii. it is cross reactive with advanced glycosylation endproducts formed in vitro; and
- iii. it is not cross reactive with the following advanced glycosylation endproducts however formed: 2-(2-fuwyl)-4(5)-(2-furanyl)-1H-imidazole (FFI); 1-alkyl-2-formyl-3,4-diglycosyl pyrrole (AFGP), 5-hydroxymethyl-1-alkylpyrrole-2-carbaldehyde (pyrraline), and pentosidine.
20. The composition of claim 19 wherein said in vivo-formed advanced glycosylation endproducts are selected from the group consisting of Hb-AGE, AGE-HSA, serum AGE-peptides, urinary AGE-peptides, and combinations thereof.
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Type: Grant
Filed: Jun 7, 1995
Date of Patent: Mar 31, 1998
Assignee: The Rockefeller University (New York, NY)
Inventor: Richard J. Bucala (New York, NY)
Primary Examiner: Christina Y. Chan
Assistant Examiner: Emma Cech
Law Firm: Klauber & Jackson
Application Number: 8/484,869
International Classification: A61K 39395; C07K 1618;
